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Proof step 11 from proof middle-coef-divides-not (previous step)

(fac(2 * i - i) * fac(i)) * i0 = fac(2 * i), 0 ≤ i, 0 < i, prime(j), 2 * i < j, j | fac(2 * i) / (fac(2 * i - i) * fac(i)) ⊦

User applied rule insert equation

And obtained the following new goals

Proof step 12:
(fac(2 * i - i) * fac(i)) * i0 = fac(2 * i), 0 ≤ i, 0 < i, prime(j), 2 * i < j, j | ((fac(2 * i - i) * fac(i)) * i0) / (fac(2 * i - i) * fac(i)) ⊦

Rule argument

pos: left 1 flags: rotate

Additional information